Laptop waking up in bag: go back to sleep script


 
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Operating Systems Linux Debian Laptop waking up in bag: go back to sleep script
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Old 06-29-2008
Laptop waking up in bag: go back to sleep script

I have a Debian-derived distro (Kubuntu 8.04) running on a Dell Inspiron laptop. This laptop often wakes from RAM suspension while in my bag. I would like to run a script, upon RAM suspension wake, that would detect if the lid switch is closed. If so, then the script should put the machine back in RAM suspension. Something like this:
Code:
wait 5 seconds
if (lid==open) {
  go to ram suspension
}
return

I do not know how to poll the lid switch, nor do I know how to suspend to RAM from within a script. I have googled but cannot find this. Can someone point me to a RTFM where TFM shows how to do these two actions? Note that other than a short C course in university and a smithering of PHP I really know nothing about computers. I will ask on my distro's mailing list how to have the script run at wake. Thanks in advance.
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sleep(3)						     Library Functions Manual							  sleep(3)

NAME
sleep - Suspends execution for an interval of time LIBRARY
Standard C Library (libc.a) Threads Library (libpthreads.a) SYNOPSIS
#include <unistd.h> unsigned int sleep ( unsigned int seconds ); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: sleep(): XPG4, XPG4-UNIX Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Specifies the number of seconds to sleep. DESCRIPTION
The sleep() function suspends execution of a process for the interval specified by the seconds parameter. The suspension time may be longer than requested due to the scheduling of other activity by the system. In a multi-threaded environment, the sleep() function is redefined so that only the calling thread is suspended. RETURN VALUES
If the sleep() function returns because the requested time has elapsed, it returns 0 (zero). If the sleep() function returns because it caught a signal, the function returns the number of seconds remaining in the suspension. RELATED INFORMATION
Commands: wall(1), shutdown(8) sleep(1) Functions: sigaction(2), alarm(3), pause(3) Standards: standards(5) delim off sleep(3)